Grok is an LLM, it's just as likely to make shit up as to actually pull real data, regardless of where it claims to be sourcing from.
RussiaMatters (part of Harvard university), in their July update (https://www.russiamatters.org/news/russia-ukraine-war-report-card/russia-ukraine-war-report-card-july-9-2025), has a bar chart with total Russian territorial control broken down by month since the February invasion, including up to June 2025. It's in square miles instead of square kilometers, but the conversion isn't hard: multiply by 2.59. It shows long periods of stagnation with some periods of gains. It does not paint a picture of there being any significant changes in years.
I don't think that unlimited western aid is realistic. Or rather, the aid itself could be unlimited, because it's a very small amount to western economies (the aggregate GDP of NATO countries is ~9x that of Russia, whose economy is smaller than Canada), but it depends on the political will to continue that aid, which is not unlimited. Unlimited Russian endurance is also unrealistic, their economy can't sustain this pace forever, especially as they've almost burned through the Soviet legacy stockpile.
I can't speak for a UK taxpayer. As a Canadian taxpayer, I want to see more of my tax dollars go to help defend Ukraine. I don't think we're helping enough. However, public opinion polling in Canada is that 48% say the current level of support is about right, 14% says it's not enough, and 17% says it's too much. So I don't expect it to change.
As for the money that Ukraine is getting from seized Russian assets, what they're getting is all derived from interest on the seized assets, with the original assets themselves still remaining intact. This skirts around the issue about the legal ability to do anything with the assets themselves. I don't think that Russia will ever be in any position to demand the seized assets back, as most of the world sees Russia as the aggressor (Russia is generally perceived to be equivalent to WW2 Germany) who will be expected to pay reparations, and Russia doesn't have any leverage over the countries that have seized the assets. Europe's economy is not currently in crisis. Their economic outlook is "mixed" at worst.